Numerical and experimental benchmark solutions on vibration and sound radiation of an Acoustic Black Hole plate

Li Ma, Li Cheng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

8 Citations (Scopus)

Abstract

Acoustic Black Hole (ABH) has been attracting the ever-increasing attention from the scientific community as a passive, effective and lightweight solution for vibration and noise mitigations of vibrating structures. Most existing work, however, relies on numerical simulations using Finite Element models, except a few cases where alternative methods are attempted. In general, there is a lack of well-calibrated experimental benchmark solutions for model validations and phenomena assertions, especially in 2D cases where precise fabrication of ABH indentations with well-controlled thickness profile is a challenge. In this paper, a rectangular plate embodied with a symmetric circular ABH indentation is meticulously manufactured and experimentally tested in terms of eigen-frequencies, mode shapes, forced vibration response and radiated sound power in a baffled half-space. These results offer useful benchmark solutions for future ABH studies. In particular, experimental results show a high consistency with the ones predicted by the previously developed 2D Daubechies wavelet (DW) model.

Original languageEnglish
Article number107223
JournalApplied Acoustics
Volume163
DOIs
Publication statusPublished - Jun 2020

Keywords

  • Acoustic Black Hole (ABH)
  • Benchmark solutions
  • Daubechies wavelet (DW) model
  • Vibration and noise control

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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